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Some teachers armed with safety buttons

By Evening Express staff
updated 4:50 PM EST, Fri December 21, 2012
NEED TO KNOW
  • 'Safe Schools' system was originally developed to help hearing impaired children
  • Teachers wear microphones around necks and when safety button is pressed administrators are alerted

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Some teachers armed with safety buttons

Some schools are arming their teachers with a different kind of weapon -- one that lets authorities get a sneak peek at the activity in their classrooms.

Evening Express shows you how the "Safe Schools" technology works and where it's available.

Watch Evening Express 5 p.m. to 7 p.m. ET on HLN.

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